#import <Foundation/Foundation.h>

@interface Test : NSObject
- (int) add:(int) x by: (int) y;
@end

@implementation Test
- (int) add:(int) x by: (int) y {
    return x + y;
}
@end

int main(int argc, char *argv[], char *envp[]) {
    Test *t = [[Test alloc] init];
    NSLog(@"%d", [t add:3 by: 4]);
    return 0;
}